NFC: st21nfcb: Add HCI transaction event support

The transaction notifies the host (DH) that an action
is required to manage a specific Secure Element application.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/nfc/st21nfcb/st21nfcb_se.c b/drivers/nfc/st21nfcb/st21nfcb_se.c
index f7977a4..9f4d8b7 100644 (file)
--- a/drivers/nfc/st21nfcb/st21nfcb_se.c
+++ b/drivers/nfc/st21nfcb/st21nfcb_se.c
@@ -311,14 +311,35 @@ static int st21nfcb_hci_connectivity_event_received(struct nci_dev *ndev,
                                                struct sk_buff *skb)
 {
        int r = 0;
+       struct device *dev = &ndev->nfc_dev->dev;
+       struct nfc_evt_transaction *transaction;
 
        pr_debug("connectivity gate event: %x\n", event);
 
        switch (event) {
        case ST21NFCB_EVT_CONNECTIVITY:
+
        break;
        case ST21NFCB_EVT_TRANSACTION:
-       break;
+               if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
+                   skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
+                       return -EPROTO;
+
+               transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev,
+                                           skb->len - 2, GFP_KERNEL);
+
+               transaction->aid_len = skb->data[1];
+               memcpy(transaction->aid, &skb->data[2], skb->data[1]);
+
+               if (skb->data[transaction->aid_len + 2] !=
+                   NFC_EVT_TRANSACTION_PARAMS_TAG)
+                       return -EPROTO;
+
+               transaction->params_len = skb->data[transaction->aid_len + 3];
+               memcpy(transaction->params, skb->data +
+                      transaction->aid_len + 4, transaction->params_len);
+
+               r = nfc_se_transaction(ndev->nfc_dev, host, transaction);
        default:
                return 1;
        }